Authentication Bypass by Spoofing in GitLab_CVE-2025-12653

6.5 / 10

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 18.4.5, 18.5 before 18.5.3, and 18.6 before 18.6.1 that under specific conditions could have allowed an unauthenticated user to join arbitrary organizations by changing headers on some requests.

Basic Information

ID CVE-2025-12653

Source GitLab

Published Nov 26, 2025 at 19:46

Affected Product

Vendor GitLab

Product GitLab

Version 18.3

Affected Versions GitLab GitLab 18.3
GitLab GitLab 18.5
GitLab GitLab 18.6

CWE Classification

CWE-290

References

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    "lastseen": "",
    "description": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 18.4.5, 18.5 before 18.5.3, and 18.6 before 18.6.1 that under specific conditions could have allowed an unauthenticated user to join arbitrary organizations by changing headers on some requests.",
    "published": "2025-11-26T19:46:12.641Z",
    "modified": "2025-11-26T19:46:12.641Z",
    "type": "cve",
    "title": "Authentication Bypass by Spoofing in GitLab",
    "source": "GitLab",
    "references": "https://gitlab.com/gitlab-org/gitlab/-/issues/579372\nhttps://hackerone.com/reports/3370245",
    "id": "CVE-2025-12653",
    "bulletinFamily": "",
    "cwe": [
        "CWE-290"
    ],
    "cvelist": null,
    "sourceData": "GitLab GitLab 18.3\nGitLab GitLab 18.5\nGitLab GitLab 18.6",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
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        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "GitLab",
    "version": "18.3",
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    "ai_description": "",
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    "ai_score": 0
}